Do you know how many units (and the mix of units) that you need to sell in order to cover your costs and break even?
This is an important figure for every business.
Now you can work out how many units you need to sell to make a particular level of profit.
And finally, you can work out your marketing and sales plan to actually sell that number of units. (Okay, there’s a bit more to it than just working out the numbers but at least you know what you’re aiming for)